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"To have him out of the lineup for an extended period, it's extremely difficult," Bulls coach Fred Hoiberg said (via NBC Sports Chicago). "When you have a guy who is out there and really made strides over the course of last season and the summer he had and the way he played during training camp, it's difficult to miss him."

Dunn suffered the injury in the second quarter when he landed awkwardly following a layup. He finished the game with nine points and seven assists.

Cameron Payne and Ryan Arcidiacono are expected to play more minutes with Dunn sidelined. Chicago also signed point guard Tyler Ulis to a two-way contract earlier this month.

"(Payne) had his best game of maybe his career a couple games ago against Detroit," Hoiberg said. "He has some things he can build on … Arcidiacono is one of the better communicators and hardest-playing guys on our team. We've got guys who have some starting experience. It's big shoes to fill. But I'm confident our guys will give great effort."